KR970000802B1 - Method and apparatus for manufacturing slide fastener chain with separable bottom and stop members - Google Patents

Abstract

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Description

Method and apparatus for manufacturing a zipper chain having a separate bottom stop member

1 is a schematic side view of a partially broken device for continuously manufacturing a zipper chain having a separate bottom stop assembly according to the present invention;

Figure 2 is a perspective view showing a reinforcing film attachment mechanism of the apparatus applied to the present invention.

3 is a vertical sectional view showing an ultrasonic welding machine forming one part of the reinforcing film attachment mechanism.

Figure 4 is a vertical cross-sectional view showing a thermal welding device forming the other portion of the reinforcing film attachment device.

5 is a plan view showing a pair of continuous zipper tapes each having a reinforcing tape attached thereto.

6 is a plan view showing the mold surface of the mold used in one embodiment of the present invention.

7 is an enlarged sectional view taken along the line X-X of FIG.

8 is a schematic plan view of a gate cutting roller used to remove runner and gate portions from a molded zipper chain.

9 is a plan view of a zipper having a coupling element row and a member of a separate bottom stop assembly shown in a state immediately after removing the runner portion and the gate portion.

FIG. 10 is a plan view showing a zipper chain having a box attached to a first pin member to complete a separate bottom stop assembly. FIG.

11 is a plan view of a zipper chain produced as a final product from the zipper chain according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Zipper tape 2: Supply unit

3: measuring unit 4: mounting unit

5: cloth sharing knit 6: positioning means

7: Molding Unit 8: Control Unit

9: Tape Clamping Device 10: Tape Pullback Device

11: reinforcing film tape 12: cutter

13: gripper 14: pin

16, 17: positioning hole 19: proximity switch

20: cavity 21: runner

22: gate 23: taylor

24 coupling element 25 first pin member

26: second pin member 27: control bar

28: gate portion 29: runner bur

30: gate cutting roller 33: cutout

34: elementless space part 35: box

The present invention relates to a method and apparatus for manufacturing a zipper chain having a detachable bottom stop member (a first pin member and a second pin member for attaching a box), and a method for manufacturing a zipper with the zipper chain. In particular, the present invention provides a method for continuously manufacturing a plurality of longitudinally spaced zipper chains with high precision positioning to cope with the manufacture of zippers of various lengths having separate bottom stop assemblies, and such zipper chains. The present invention relates to a method for manufacturing a zipper and an apparatus for implementing the method of manufacturing a zipper chain.

The molding apparatus described in British Patent No. 1,551,535 has a mold for forming a tape supply passage through which a pair of zipper stringer tapes (hereinafter referred to as zipper tapes) are intermittently supplied. In accordance with the intermittent supply of the zipper tape, the molten thermoplastic composite material is injected into the mold to form a coupling element along the inner longitudinal edge of the zipper tape which faces together with the top stop member. At the same time, the length of the molded coupling element rows can be adjusted to cope with the trend of small batch production of zippers.

The mold consists of a movable mold member and a stationary mold member that form two rows of cavities for forming the coupling element. Each mold member is provided with a rectangular slide core. Each slide core is disposed at a downstream end of the corresponding mold member and is slidable in a direction perpendicular to the longitudinal axis of the runner. The opposing mold surface of the slide core forms two cavities for forming a top end stop member and a recess connecting the cavities and the runner. The cavity and the recess are formed in the portion of the slide core located on one side of the slide core in the slide movement direction of the slide core. The side surface of the slide core except the portion connecting the recess and the runner forms a sealing surface for sealing one open end of the runner. The slide core can be moved by the cylinder between a first position where the recess is connected to the runner and a second position where the end of the runner is sealed. The control bar is inserted by sliding into the runner from the upstream end of the mold. By varying the insertion length of the control bar relative to the runner, the length of the coupling element row to be shaped can be adjusted.

The control bar is moved longitudinally to a position at which a length of coupling element string can be formed to form a raw of coupling element having a length n times greater than a predetermined length. At this time, the molten thermoplastic synthetic resin material is injected into the mold. Thereafter, the zipper tape is advanced by a distance equal to the predetermined length of the coupling element. In the final injection molding process, if the slide core is moved to the first position to connect the recess and the runner, the aforementioned injection molding process and the tape progressing process are repeated n times. Thereafter, the zipper tape is advanced by a distance equal to the sum of the length of the elementless space portion to be provided between two adjacent zipper chains and the predetermined length. By repeating the above-described operation sequence, a plurality of longitudinally spaced zipper chains having two rows of coupling elements and top stop members of desired length (n times the predetermined length) formed on each zipper tape can be continuously manufactured. Can be. In addition, by appropriately adjusting the insertion length of the control bar to the runner, a series of longitudinally spaced zipper chains, each having two rows of coupling elements and two top stop members of desired length, can be produced continuously.

In the manufacture of such a zipper chain having a separate bottom stop assembly, it was usual to form a reinforcing film layer on the zipper tape to reinforce the portion of the zipper tape to which the member of the separate bottom stop assembly is attached. The formation of the reinforcement film is achieved by attaching the reinforcement film to the detachable bottom stop attachment portion of the zipper tape before the coupling element rows are formed on the zipper tape.

However, as described in Japanese Patent Laid-Open No. 63-40085, a reinforcing film generally has a zipper tape adjacent to one end of an element-free space portion formed between two adjacent zipper chains each having two rows of coupling elements. Is attached to.

Since the zipper tape has a certain elasticity, the length of the zipper tape is variable according to the tension change on the zipper tape which may occur when the zipper tape is advanced or the coupling element rows and the members of the detachable bottom stop assembly are attached. This change in the length of the zipper tape accumulates when the zipper tape is produced continuously for a long time. Therefore, if the reinforcing film layer is formed on the zipper tape before the coupling element rows and the members of the separate bottom stop assembly are formed, accurate positioning of the reinforcement film layer is impossible due to the cumulative dimensional change of the zipper tape.

If the reinforcing film layer is incorrectly positioned, eventually the coupling element and the separate bottom stop assembly are incorrectly formed.

In the method of manufacturing the zipper chain having the end stop member described in the above-mentioned British patent, it is impossible to preform the reinforcing film layer on the zipper tape unless it depends on other suitable measuring means for the reasons mentioned above. Therefore, the reinforcing film layer should be formed in the portion of the zipper tape disposed adjacent to the molded end stop member. However, in this case, since the coupling element row and the end stop member are molded at the same time, the reinforcing film attachment method as described in Japanese Patent Laid-Open No. 63-40085 cannot be used without substantial reconstruction. Therefore, other reinforcing film attachment technology that can be used in combination with the above-described zipper chain manufacturing method should be developed. In order to avoid this disadvantage, in addition to the cavity for forming the end stop member, the mold forming the element forming cavity and the end stop member forming cavity has a cavity for forming the reinforcing film, and it is considered that the end stop member and the reinforcing film layer are simultaneously formed. It may be. However, the molded reinforcement film is relatively thick and the synthetic resin material is introduced into the material of the zipper tape, thereby making the stringer tape inflexible. Inflexible zipper tapes having a relatively thick reinforcement film layer will cause various problems before subsequent processing, such as sewing operations.

Therefore, the main object of the present invention is to solve all the problems associated with the prior art.

A more specific object of the present invention is to position a plurality of longitudinally spaced zipper chains each having a pair of coupling element rows of desired length and a pair of separate bottom stop members formed on the inner longitudinal edge of the pair of continuous zipper tapes. It is to provide a method that can be continuously manufactured with precision.

Another object of the present invention is to provide an effective method for manufacturing a zipper with a zipper chain using a portion of the positioning means to attach the boxes of the separate bottom stop assembly to the first and second pin members of the separate bottom stop assembly. will be.

Still another object of the present invention is to provide an apparatus for applying the method of manufacturing the zipper chain.

According to a feature of the present invention, the present invention provides a method of manufacturing a zipper chain having two rows of coupling elements formed on a pair of continuous zipper tapes and a pair of separate bottom stop members, the pair of continuous zipper tapes along a supply path. Intermittently advancing, attaching a pair of reinforcement films to each of the pair of detachable lower end member forming portions of the zipper tape, and a pair of positioning holes on the reinforcement film at substantially the same time as the reinforcing film attachment step. Each step is formed in the position. This method also includes positioning the longitudinal portion of each zipper tape in the mold using a positioning hole, and injection molding two rows of coupling elements and a pair of separate end stop members into the zipper tape in the mold. Further comprising steps.

According to another feature of the invention, there is provided an apparatus for carrying out the method of claim 1, comprising: supply means for intermittently supplying a pair of continuous zipper tapes along a supply path, and a pair of each zipper tape; Measuring means arranged in the supply path for measuring the moving length of the zipper tape supplied to determine the removable bottom stop member molded part, and the measuring means for attaching a pair of reinforcement films to the separate bottom stop member molded part of the zipper tape, respectively Attachment means disposed downstream of the measuring means, and puncturing means disposed downstream of the measuring means and operatively locked with the attachment means to form a pair of positioning holes at a pair of predetermined positions on the reinforcing film. do. In addition, the apparatus further includes a molding unit disposed downstream of the drilling means, and control means for controlling the operation of the supply means, the attachment means, the drilling means and the molding unit according to the information received from the measuring means. Wherein the forming unit is operative to form a pair of separate bottom stop members on the longitudinal portion of the zipper tape and the positioning holes of the zipper tape to position each longitudinal portion of the zipper tape relative to the forming unit in the forming unit. It has a pair of positioning pins that can be accommodated inside.

In order to produce a zipper having a detachable bottom stop assembly with the zipper chain produced by the above-described method, the positioning holes of the zipper tape are partially cut away to extend transversely from the inner longitudinal edges of each zipper tape. The notch of the mold is formed. The cutout at the location where the zipper tape with the reinforcement film is cut is used to attach the box of the separate bottom stop assembly.

The above and other objects, features and advantages of the present invention will become apparent to those skilled in the art with reference to the following detailed description and the accompanying drawings in which preferred embodiments in accordance with the principles of the invention are shown.

In the following, a process for forming a zipper chain comprising a pair of coupling elements having a predetermined length and a detachable bottom stop assembly by the apparatus of the present invention will be described.

The feed roller is driven to advance the zipper tape. At this time, the movement length of the zipper tape is measured by the first measuring means so that the rotation of the feed roller is stopped by the control unit when the movement length of the zipper tape is equal to the predetermined molding length. When the feed rollers are stopped, the reinforcement film attachment portion of each zipper tape is located in the reinforcement film attachment means. At this time, the reinforcement film pieces cut into two predetermined lengths are placed on and under the zipper tape and welded to the front and rear surfaces of the zipper tape, and the round edges of the zipper tape are wrapped in the reinforcement film. Simultaneously with this welding, the drilling means are operated to form a pair of positioning holes at predetermined positions on each reinforcing film attachment portion.

After a predetermined tension is applied to the zipper tape, the desired number of coupling elements is molded at the inner longitudinal edge of the zipper tape. At the same time, the first pin member and the second pin member are molded adjacent one end of the coupling element row. While the molded article is then removed from the mold, the mold face of the mold is set in a position that defines only the coupling element forming cavity.

Thereafter, the above-mentioned injection molding operation is repeated to complete the zipper chain manufacturing process of the desired length with the member of the detachable lower end assembly. Therefore, a plurality of zipper chains each having a coupling element row and a first pin member and a second pin member each having a predetermined length can be manufactured continuously one at a time.

When manufacturing a zipper chain having a separable end stop member using the apparatus of the present invention, a pair of positioning holes is formed at a predetermined position on each reinforcing film attachment portion of the zipper tape. The positioning hole is used to position the separate bottom stop member forming part of the forming unit.

It should be appreciated that the positioning hole not only has a positioning function but also has a function of facilitating the operation in the box attaching process for attaching the box to the first pin member and the second pin member.

The runner part and the like are removed from the chain before the box is attached. The two rows of coupling elements on the zipper tape from which the runner portions have been removed are then mutually coupled by passing through the coupling element coupling means. The coupling element coupling means may be a coupling device having the same structure as the tape guide portion of the zipper slider. When passing through the coupling device, not shown, the coupling element rows of the molded zippers are joined together, and the second pin member maintains contact with the coupling element located after the first pin member. As a result, the reinforcing film is displaced in the longitudinal direction of the coupling element row by the same distance as one pitch of the element. By the displacement of the reinforcement film, the positioning holes of the reinforcement film, which were initially shifted by one pitch of the element, are fixed in axial direction with each other.

Thereafter, the reinforcing film portions extending between the positioning holes such that a pair of U-shaped cutouts are respectively formed on the zipper tape are cut together with the corresponding portions of the zipper tape by the cutting device. Due to the presence of the U-shaped cutout, the box can be easily inserted into the element-free space portion, so that the box can be smoothly and securely attached to the first pin member and the second pin member. As described above, the positioning hole has a function of a positioning hole for determining the position on the zipper tape on which the first pin member and the second pin member are formed in the functional plane, and the ease of desired work when the box is attached. It also serves as a reference hole for the formation of the U-shaped cutouts for securing.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 shows a general configuration of an apparatus for manufacturing a zipper chain having members (a first pin member and a second pin member) of a separable bottom stop assembly according to the present invention. Such a device generally includes a supply means or a supply unit 2 for intermittently advancing a pair of continuous zipper tapes 1 along a supply path (hereinafter referred to as a tape supply path) and a reinforcement film of each zipper tape 1. Measuring means or measuring unit 3-1 and zipper tape 1 disposed in the tape feed path for measuring the moving length of the zipper tape 1, which proceeds to determine the portion (same as the removable bottom stop member molded part). A pair of reinforcement film attachment means or attachment unit 4 disposed downstream of the measurement unit 3-1 and a pair of predetermined positions on the reinforcement film for attaching a pair of reinforcement films to the corresponding reinforcement film attachment portions of the reinforcement film. A perforation means or fabric sharing unit 5 disposed downstream of the measurement unit 3-1 so as to be operatively locked with the reinforcing film attachment unit 4 to form a positioning hole of the zipper tape 1 Medial end of Along the edge is disposed downstream of the fabric sharing knit 5 to form a pair of separate bottom stop members (first pin member and second pin member) and two rows of coupling elements of the separate bottom stop assembly on the edge, From a molding unit 7 and a measuring unit 3-1 having positioning pins 17 as positioning means composed of a pair of positioning pins accommodated in corresponding positioning holes for positioning a zipper tape therein; A control unit 8 for controlling the operation of the supply unit 2, the reinforcing film attachment unit 4, the cloth sharing unit 5, and the molding unit 7 in accordance with the received information is provided.

In the illustrated embodiment, the supply unit 2 consists of a pair of first supply rollers 2-1 and a pair of second supply rollers 2-2. The measuring unit 3-1 uses an encoder. In addition to the measurement unit 3-1, a second measurement unit 3-2 composed of an encoder is also provided. The first feed roller 2-1 is disposed adjacent to the downstream side of the cloth sharing knit 5. The second feed roller 2-2 is disposed adjacent to the downstream side of the molding unit 7. The tape clamping device 9 and the tape pullback device 10 of the first feed roller 2-1 and the second measurement unit 3-2 are arranged in the order designated from the upstream side of the tape supply path. Is placed in between. The tape clamping device 9 and the tape pullback device 10 together form a back feed means to feed the zipper tape 1 by a fine distance in the reverse direction.

The reinforcement film attachment unit 4 can use the same as the reinforcement film attachment unit shown in the already described Japanese patent publication 63-40085. As shown in FIG. 2, the reinforcement film attachment unit 4 is generally configured such that a pair of continuous tapes spaced in the vertical direction of the reinforcement film is intermittently supplied in a direction perpendicular to the tape supply path. The cutter 12 is disposed in the supply path of the reinforcing film tape 11 and is located at one side of the tape supply path. When the reinforcing film tape 11 is advanced by a predetermined distance, the cutter 12 is driven to cut the upper and lower pieces of the reinforcing film tape 11 from the continuous reinforcing film tape 11. The gripper 13 is disposed on the opposite side of the tape feed passage that coincides with the feed passage of the reinforcing film tape 11. The gripper 13 reciprocates with respect to the reinforcing film pieces cut across the tape supply path to hold the front ends of the respective reinforcing film tapes 11, and then the reinforcing film tapes 11 at the top and bottom of the zipper tape at rest. Transport the reinforcing film piece to the position where

An ultrasonic welding device or welder 4-1 constituting a part of the reinforcement film attachment unit 4 is disposed at a position corresponding to the reinforcement film attachment portion of each zipper tape 1 at rest. The ultrasonic welding machine 4-1 is composed of an ultrasonic horn 4-1a and an anvil 4-1b configured to have the cross-sectional shape shown in FIG. The ultrasonic horn 4-1a and the anvil 4-1b interact with each other to cut the upper and lower reinforcement film pieces at the center thereof and to weld them to the inner longitudinal edge portion of the zipper tape 1 by the upper and lower reinforcement films. A rounded inner longitudinal edge 1-1 surrounded by a piece is formed. The heat welding apparatus 4-2 constituting the other portion of the reinforcing film attachment unit 4 is disposed adjacent to the downstream side of the ultrasonic welding machine 4-1. The heat welding apparatus 4-2 is composed of a pair of upper and lower die plates 4-2a and 4-2a, each provided with a heater (not shown). As shown in FIG. 4, the upper and lower die plates 4-2a and 4-2a are driven in mutual directions by appropriate action means (not shown), so that the cost of the reinforcing film tape 11 therebetween. The attachment parts are gripped and these are welded to the zipper tape 1. In the illustrated embodiment, the ultrasonic horn 4-1a has a number of pins 14 in its downward front, as shown in FIGS. 3-5, while the anvil 4-1b is round. Corresponding pins 14 of ultrasonic horns 4-1a at their upward front face to form a plurality of pinholes 1-2 in the zipper tape 1 near the inner longitudinal edge 1-1. There are a number of holes (shown in FIG. 3 but not shown) to receive the holes. The first pin member and the second pin member of the detachable bottom stop assembly are formed in each of the zipper tapes 1 in the manner described below, and the molten synthetic resin material flows into the pinholes 1-2 to form the first and second pin members. The upper and lower portions of the pin member are integrally connected to firmly attach the pins to the corresponding zipper tapes 1.

The cloth sharing knit 5 disposed adjacent to the downstream side of the heat welding apparatus 4-2 to form a pair of positioning holes 16a and 16b in the zipper tape 1 is the most important structural part of the present invention. The cloth sharing knit 5 is disposed at a predetermined position where the reinforcing film tape 11 is positioned while the zipper tape 1 is at rest. The cloth sharing knit 5 is disposed below the main body 5-1, which is driven by a suitable actuator such as an air cylinder (not shown), and vertically reciprocates simultaneously with the heat welding apparatus 4-2, and a tape supply path. And a die 5-2 coinciding vertically with the cloth sharing knit body 5-1. The main body 5-1 of the punched joint knit has a pair of punched punches 5-3 (see FIG. 1) having a predetermined diameter at the bottom thereof, while the die 5-2 has a corresponding punched punch ( 5-3) having a pair of holes (not shown). The relative position between the cloth sharing knit 5 (ie, the main body 5-1 and the die 5-2) and the heat welding apparatus 4-2 can be adjusted by, for example, a bowl screw mechanism (not shown). Can be.

In the illustrated embodiment, the positioning holes 16a and 16b formed in each zipper tape 1 across the thickness of the reinforcing film tape 11 are formed by the pitch of each coupling element as shown in FIG. The zipper tape 1 is shifted in the longitudinal direction at the same distance as P). In particular, the positioning hole 16b formed on the side of the first pin member 25 is one of the coupling elements than the positioning hole 16a formed on the second pin member 26 side as shown in FIG. The pitch P is closer to the end of the corresponding coupling element row.

The first feed roller 2-1 disposed adjacent to the downstream side of the fabric sharing unit 5 is intermittently driven by an instruction supplied from the control unit 8 based on the data from the measurement unit 3-1. . The control unit 8 stores not only data on the production procedure but also various data on the production control such as the length, color tone, yield and production order of the zipper chain having a separate bottom stop assembly. On the basis of various signals continuously supplied from the measuring unit 3-1, the second measuring unit 3-2 and the proximity switch (to be described later), the control unit 8 generates control signals in accordance with a predetermined control program. Transfer to various implements. The measuring unit 3-1 is mainly used to determine the length of the coupling elements of two rows to be molded, the length of the element-free space, and the position on the zipper tape to which the reinforcing film tape 11 is attached.

The tape clamping device 9 and the tape pullback device 10 are disposed downstream of the measurement unit 3-1 in the order as shown from the upstream side of the tape supply path. The tape clamping device and the tape pull back device 9 and 10 cooperate with each other to pull the zipper tape 1 slightly in the opposite direction of the advancing direction so that the longitudinal direction of each zipper tape 1 positioned in the molding unit 7 is maintained. While pulling the part, a fin member and a coupling element row of the separate bottom stop assembly are molded in the forming unit 7.

The tape clamping device 9 is a vertical reciprocating pressing member 9-1 disposed above the tape supply path and a guide roller 9 disposed below the pressing member 9-1 to guide the lower surface of the zipper tape 1. It consists of -2). The tape pullback device 10 is composed of a pullback bar 10-1 extending across the upper surface of the zipper tape 1 and a cylinder actuator 10-2 for vertically reciprocating the pullback bar 10-1. The reverse feed of the zipper tape 1 achieved by the tape clamping device 9 and the tape pullback device 10 is placed on the measuring unit 3-1, the reinforcing film attachment unit 4 and the cloth sharing unit 5, and then transversely. It does not have any influence on the upstream side of the zipping zipper tape 1. Therefore, the moving length of the zipper tape 1 achieved by the subsequent forward feeding has nothing to do with the influence of the reverse feeding of the zipper tape 1. The operation of the tape clamping device 9 and the tape pull back device 10 is controlled in accordance with the command supplied from the control unit 8.

The second measuring unit 3-2 is provided with a zipper tape supplied to the forming unit 7 whenever two rows of coupling elements are to be molded or two pin members of the two-coupling elementless split bottom stop assembly are to be molded at the same time. It is arranged between the tape pullback device 10 and the molding unit 7 to measure the length of a part of 1). Due to this measurement, the length of the molded article (ie the zipper chain with the separate bottom stop assembly) can be precisely controlled. In particular, when the pin member and the coupling element of the detachable bottom stop assembly are to be molded at the same time, the measurement by the second measuring unit 3-2 is performed by the reinforcing film attachment portion of the zipper tape 1 (forming the detachable bottom stop member The positioning holes 16a and 16b in the sub) are made to pass the position of the corresponding positioning pin 17 of the molding unit 7 minutely.

The molding unit 7 disposed adjacent to the downstream side of the second measuring unit 3-2 has a structure almost identical to that of the molding unit described in the above-mentioned British Patent No. 1,551,635. As shown in FIG. 6 and FIG. 7, the molding unit 7 has an upper movable mold member 7-1 and a lower fixed mold member 7-2. The mold members 7-1 and 7-2 have opposite mold faces symmetrically formed to form the cavity 20, the runner 21 and the gate 22. Like the molds described in the above-mentioned British patent, these molds are assembled with movable and stationary mold members 7-1 and 7-2, respectively, and a pair of slide cores 7-1a sliding in a direction perpendicular to the tape feed path. 7-2a). As shown in FIG. 6, each slide core 7-1a, 7-2a (only the slide core 7-2a associated with the stationary mold member 7-2 is shown) is coupled to the coupling element 24. As shown in FIG. 2) mold cavity 20a for molding (see FIG. 9), and mold cavity 20b aligned with a row of mold cavities 20a for forming the first pin member 25 of the separate bottom stop assembly. And a first half formed of a mold cavity 20c that is aligned with a mold cavity 20a of another row for forming the second pin member 26 of the separate bottom stop assembly, wherein the mold cavity 20a, 20b , 20c is connected to the runner 21 by a plurality of gates 22. In the second half, each of the slide cores 7-1a and 7-2a is formed with two rows of cavities 20a of equal pitch to form the coupling element 24, the cavities 20a being The gate 22 is connected to the runner 21 by a plurality of gates 22. The runners 21 of the first half and the runners 21 of the second half are symmetrical with respect to the centerline, and the slide cores 7-1a and 7-2a are formed with corresponding mold members 7-1 and 7-. It is selectively aligned with the runner 21 of the mold when moving to the position related to 2).

In the mold of the present invention, as shown in FIG. 7, the slide core 7-1a of the movable mold member 7-1 protrudes from the mold surface, and the positioning holes 16a and 16b of the zipper tape 1 are respectively. Having a pair of positioning pins 17 engaged with each other, and a pair of pin receiving plug holes 18 for the slide cores 7-2a of the fixed mold member 7-2 to receive the positioning pins 17, respectively. ) And a pair of proximity switches 19 are each different from the above-mentioned British patent in that they are arranged at the bottom of the pin receiving hole.

As shown in FIG. 7, the positioning pins 17 are each pressed by a pair of compression coil springs 17a so as to project downward from the mold surface of the slide core 7-1a. The on-off signal from the proximity switch 19 is transmitted to the tape clamping device 9 and the tape pullback device 10 through the control unit 8 of FIG. 1 to control the operation of these devices 9 and 10. . The feeler 23 (see FIG. 6) projects from the mold surface of the stationary mold member 7-2 at a position aligned with the runner 21 immediately downstream of the slide core 7-2a. . Although not shown, the movable mold member 7-1 has a hole corresponding to the position of the sealer 23 for accommodating the sealer 23 therein. As shown in FIG. 1, the control bar 27 is slidably received in the runner 21 of the movable mold member 7-1 from its upstream end. The control bar 27 is inserted by sliding longitudinally by an appropriate actuator (not shown) to adjust the length of the two rows of coupling elements formed by one injection molding process of the molding unit 7.

The second feed roller 2-2 disposed downstream of the molding unit 7 is intermittently driven under the control of the command received from the control unit 8. The zipper chain manufacturing apparatus of the above configuration is composed of a combination of a top stop application unit, a slider application unit, a box attachment unit and a tape cutter (all not shown) disposed on the downstream side of the second feed roller (2-2). The gate cutting roller 20 is connected with the second feed roller 2-2 to remove the runner portion and the gate portion from the molded product.

Using the above-described apparatus, a zipper chain having two rows of coupling elements having a predetermined length and a first pin member and a second pin member of a detachable bottom stop assembly formed on a zipper tape in a manner described below can be manufactured.

First, the slide cores 7-1a and 7-2a of the movable and stationary mold members 7-1 and 7-2 are arranged in the state shown in FIG. 6, and the cavity 20a for forming the coupling element rows. And the cavities 20b and 20c for forming the first and second pin members are connected through the gate 22 and the runner 21. A control bar 27 shown in FIG. 1 along the runner 21 is arranged to adjust the length of the row of cavities 20a to a value of 1 / n of the predetermined length of coupling element rows to be molded. Where n is an integer. Thereafter, the first feed roller 2-1 and the second feed roller 2-2 are driven to advance the zipper tape 1 longitudinally from left to right in FIG. At this time, the moving length of the zipper tape 1 is measured by the first measuring unit 3-1. When the moving length of the zipper tape 1 is equal to the predetermined molding length, the first measuring unit 3-1 sends a signal to the control unit 8 so that the first and second supply rollers 2-1 and 2-2 Stop the rotation of the

When the first and second feed rollers 2-1 and 2-2 are stopped, the reinforcement film attachment portion of each zipper tape 1 reaches the ultrasonic welding machine 4-1 of the reinforcement film attachment unit 4. do. While the zipper tape 1 is at rest, two cut reinforcing film tapes 11 of a predetermined length are respectively placed above and below the zipper tape 1 by the gripper 13 (see FIG. 2), Thereafter, the ultrasonic welder 4-1 is driven to wrap the inner longitudinal edge portion of the zipper tape 1 including the round longitudinal edge 1-1 in the reinforcement film to cut and weld the reinforcement film piece. Simultaneously with this welding, a plurality of pinholes 1-2 are formed adjacent to each rounded edge 1-1 of the zipper tape 1. Then, the first and second feed rollers 2-1 and 2-2 are driven again until the reinforcing film tape 11 on the zipper tape 1 arrives at the heat welding apparatus 4-2. Proceed 1). In response to the arrival of the reinforcing film tape 11, the heat welding apparatus 4-2 is driven to weld the reinforcing film tape 11 to the portion of the zipper tape 1 except the rounded edge 1-1. Therefore, the reinforcing film tape 11 is completely welded with the reinforcing film attachment portion of the zipper tape (1). Simultaneously with this welding, the cloth sharing knit 5 is driven to form a pair of positioning holes 16a and 16b in the zipper tape 1 at a predetermined position on the reinforcing film attachment portion as shown in FIG.

Then, the first and second feed rollers 2-1, 2b, and 16b until the positioning holes 16a and 16b formed in the reinforcing film attaching part slightly exceed the positions of the corresponding positioning pins 17 of the molding unit 7. 2-2) is driven again under the control of the second measuring unit 3-2 to advance the zipper tape 1. When the positioning holes have exceeded the positions of the corresponding positioning pins, the first and second supply rollers 2-1 and 2-2 are stopped. At this time, the upstream end of the pair of coupling elements 24 already formed slides the sealer 23 downstream. The movable mold member 7-1 has already been lowered to a position close to the fixed mold member 7-2.

According to the structures of the movable and fixed mold members 7-1 and 7-2 spaced apart in this manner, the elastic core of the compression coil spring 17a is moved downward from the slide core 7-1a of the movable mold member 7-1. The protruding positioning pin 17 elastically contacts the zipper tape 1 in progress. Therefore, when the positioning holes 16a and 16b pass through the corresponding positioning pins 17, the downwardly positioning positioning pins 17 are inserted into the positioning holes 16a and 16b to form the compression coil springs. Under a resilient force, the proximity switch 19 is moved downward into the pin receiving hole 18 in the slide core 7-2a of the fixed mold member 7-2 and finally disposed at the bottom of each pin receiving hole 18. It works. According to this operation, the signal of the proximity switch 19 is transmitted to the tape clamping device 9 and the tape pullback device 10 to drive the devices 9 and 10. At this time, the pressing member 9-1 of the tape clamping device 9 descends toward the guide roller 9-2 and grips the zipper tape 1 therebetween so that the zipper tape 1 has a tape clamping device 9. To prevent it from moving upstream. At the same time, the pullback bar 10-1 of the tape pullback device 10 is lowered by a predetermined distance so that the zipper tape 1 is moved downward between the tape clamping device 9 and the second measurement unit 3-2. It bends in a V shape, and thus a part of the zipper tape 1 accommodated in the forming unit 7 is pulled back slightly (in the upstream direction) and stretched under a predetermined tension. In this tensioned zipper tape 1, a space is formed between the positioning pin 17 and the taylor 23, and this space is eventually a predetermined length between two adjacent zipper chains on the zipper tape 1 To form the elementless space of.

Thereafter, the movable mold member 7-1 continues to descend to completely seal the mold, and then the molten synthetic resin material is injected into the mold, whereby two rows of coupling elements 24 having a predetermined length and the first pin member of the removable bottom stop assembly are provided. 25 and the second pin member 26 are molded along the inner longitudinal edge of the zipper tape 1.

The molded product is cooled in the mold for a predetermined time, and after the cooling time has elapsed, the mold is opened and the molded product is taken out of the mold by an ejector pin (not shown). Then, the slide cores 7-1a and 7-2a of each of the mold members 7-1 and 7-2 are moved upward from the first position in FIG. 6 so that two rows of coupling element forming cavities 20a are formed. It is moved to the second position extending longitudinally across the mold surface of the mold members 7-1, 7-2.

The zipper tape 1 then proceeds by the same distance as the subsequent forming length. At this distance, the zipper tape 1 is oversupplied until the distal end (upstream end) of the formed coupling element row 24 passes through the sealer 23. Thereafter, the tape clamping device 9 and the tape pullback device 10 are operated again to hold the zipper tape 1 slightly back until the ends of the already formed coupling element rows 24 come into contact with the sealer 23. The tension is applied to a portion of the zipper tape 1 accommodated in the molding unit 7 by pulling. The mold is then sealed and a subsequent injection molding process is performed, resulting in two rows of coupling elements 24 extending continuously with the previously formed coupling element rows 24. This injection molding process is repeated (n-1) times so that a predetermined length of the zipper chain including the first pin member and the second pin member of the pair of coupling element rows and the separate bottom stop assembly is manufactured.

The slide cores 7-1a and 7-2a of each of the mold members 7-1 and 7-2 are then displaced to occupy the first position shown in FIG. When the mold is sealed, the first injection molding process is performed, and the first pin member 25 and the second pin member 26 of the two rows of coupling elements 24 having a predetermined molding length and the separate bottom stop assembly are removed. Part of the complete zipper chain is formed. The slide cores 7-1a and 7-2a are then moved and the injection molding process takes place to form part of the complete zipper chain consisting of only two rows of coupling elements. This injection molding process is repeated (n-1) times. As a result, a zipper chain comprising two rows of coupling elements 24 having a predetermined length and a first pin member 25 and a second pin member 26 of the detachable lower end assembly is formed on the zipper tape 1.

In the manufacture of the zipper chain according to the present invention, a pair of positioning holes 16a and 16b are formed at predetermined positions on the respective reinforcing film attachment portions of the zipper tape 1. The positioning holes 16a, 16b are used to position the separate bottom stop assembly of the zipper tape 1 relative to the pin forming cavities 20b, 20c of the forming unit 7 with respect to each zipper length. Due to the positioning based on each of these zipper lengths, the process of the present invention can realize accurate positioning since there is no cumulative positioning error that can be caused by frequent tension changes on the zipper tape during continuous manufacture of long zipper chains. have.

The positioning holes 16a and 16b have a function of facilitating the assembly between the box of the detachable lower end stop assembly and the first pin member 25 and the second pin member 26 of the zipper chain in addition to the positioning function described above. Be aware of having

EMBODIMENT OF THE INVENTION Hereinafter, the box assembly process of this invention is demonstrated with reference to attached drawing.

Generally, after the injection molding process, the box 35 of the detachable bottom stop assembly is held in the first pin member 25 and the second of the molded zipper chain while the two rows of molded coupling elements 24 are held in a coupled state. It is assembled with the pin member 26. The molded zipper chain includes a plurality of gate portions 28 including a spout (not shown) formed simultaneously with the coupling element 24, the first pin member 25, and the second pin member 26 according to the molding thereof. ) And runner portion 29. This molded zipper chain is not suitable for attaching a box. Thus, the gate portion 28 and the runner portion 29 are removed from the molded zipper chain by a suitable removal device before the box is attached. As the removal device for this purpose, the gate cutting roller 30 shown in FIG. 8 can be used. The gate cutting rollers 30 form a molded coupling element 24 of a pair of laterally spaced cutting edges 31 for cutting the joint between each molded coupling element and the corresponding gate portion 28. A circumferential groove 32 for receiving and guiding is provided on the circumferential surface of the second feed roller 2-2 of the above-described embodiment.

The two rows of coupling elements 24 of the molded zipper chain, with the gate portion 28 and the runner portion 29 removed, are then interconnected by suitable coupling element coupling means (not shown). The coupling element coupling means may be a coupling device having the same configuration as the tape guide portion of the zipper slider. When passing through a coupling device (not shown), the coupling element rows of the molded zipper chain are joined together, and the second pin member 26 is positioned next to the first pin member 25 as shown in FIG. Is fixed in contact with the coupling element 24. By this coupling of the coupling element rows, the portion of the reinforcement film tape 11 which is attached by the reinforcement film attachment unit 4 is displaced in the longitudinal direction of the zipper tape 1 by a distance equal to one pitch P of the elements. . By the displacement of the reinforcement film tape 11, the positioning holes 16a and 16b of the reinforcement film tape 11, which were initially shifted by one pitch P in the longitudinal direction of the zipper tape 1, are laterally oriented to each other. Is fixed by matching.

Each reinforcing film tape 11 extending between the positioning holes 16a and 16b is then zippered by using an appropriate cutting device 36 composed of a cutting piece 36-1 and a die 36-2. It is cut together with the corresponding part of (1) to form a pair of cutouts 33 which are generally U-shaped. Following the formation of the U-shaped cutout 33, the box 35 is attached to the zipper chain by a suitable box attaching device (not shown) known in the art. The box attaching device is known, and generally, the first pin member 25 and the second pin after the box 35 is gently received in the U-shaped cutout 33 as the zipper chain proceeds toward the box placed in the box attaching device. It is configured in such a way that it is bonded onto the pin member 26 and finally welded by known welding means (not shown) and attached to the first pin member 25.

In this case, if the U-shaped cutout 33 is not present, the element-free space portion 34 manufactured by the reinforcement film tape 11 is relatively flexible, and the retainer box 35 is the element-free space portion 34. And then will prevent the first pin member 25 and the second pin member 26 from being inserted into the box 35. According to the present invention, since there is a U-shaped cutout 33, the retainer box 35 can be easily inserted into the elementless space 34. Therefore, subsequent insertion of the first pin member 25 and the second pin member 26 into the box 35 can be made smoothly and easily. As can be understood from the foregoing description, the positioning holes 16a and 16b are used to determine the position on the zipper tape 1 on which the first pin member 25 and the second pin member 26 should be molded in terms of function. A pair of U-shaped cutouts of the zipper tape 1 to facilitate the function as a positioning hole and the smooth and secure attachment of the retainer box 35 to the first pin member 25 and the second pin member 26. It also functions as a reference hole for forming the joint 33.

The order of the box attaching step described above is not limited thereto. Alternatively, the retainer box may be attached after the slider is mounted in the zipper chain.

After all the components necessary to complete each zipper is attached to the zipper chain, the zipper chain is cut across the zipper tape 1 at the U-shaped cutout 33 so that each is separated as shown in FIG. Multiple zippers with bottom stop assemblies can be produced continuously.

According to the method and apparatus of the present invention for producing a zipper chain having a separate bottom stop assembly, it can be seen from the above description that a pair of positioning holes are formed at a predetermined position on a reinforcement film attached to a pair of zipper tapes. . Positioning holes are used to position the zipper tape relative to the molding unit based on the respective zipper length. Therefore, even when a continuous zipper chain is manufactured, the positioning error that can be generated due to the change in tension on the zipper tape is limited to the extent to which only a single zipper length can be generated. Thus, the first pin member and the second pin member of the two rows of coupling elements and the separate bottom stop assembly can be accurately molded. In addition to this positioning function, the positioning hole also provides a reference point when the U-shaped cutout is formed laterally in the reinforcement film to facilitate smooth and secure attachment of the box to the first and second pin members. It also has a function to provide a reference point when the zipper chain is cut across the zipper tape at the U-shaped cutout.

In view of the foregoing, it can be clearly seen that the present invention is capable of various changes and modifications. It is, therefore, to be understood that the invention is intended to be limited within the scope of the appended claims rather than the detailed description.

The detachable bottom stop assembly is molded on the zipper tape at the same time as the coupling element rows in the above embodiment but only the detachable bottom stop assembly may be molded in the present invention. In this case, the separate bottom stop assembly is formed on the zipper chain to which the wound zipper element is attached in the previous process, or the coupling element row is formed or attached to the zipper tape in the subsequent process after the separate bottom stop assembly is formed on the zipper tape. It may be.

Claims (12)

In the method of manufacturing a zipper chain having a pair of separate bottom stop members (25, 26) formed on a pair of continuous zipper tapes (1), (a) a pair of continuous zipper tapes (1) intermittently along a supply path Advancing, (b) attaching the pair of reinforcing film tapes 11 to the pair of separate lower end member forming parts of the zipper tape 1, and (c) attaching the reinforcing film tapes (b). Forming a pair of positioning holes 16a and 16b at a predetermined position on the reinforcement film, respectively, and at substantially the same time as (d) using each of the positioning holes 16a and 16b in the molding unit 7. Positioning a longitudinal portion of the zipper tape (1); and (e) injection molding a pair of separate bottom stop members (25, 26) on the zipper tape (1) in the molding unit (7). Method for producing a zipper chain, characterized in that. 2. The method of claim 1, further comprising the step of injection molding the second row coupling element 24 on the zipper tape 1 simultaneously with the pair of separate bottom stop members 25 and 26. Way. The method of claim 1, wherein between the positioning step (d) and the injection molding step (e), the zipper tape 1 is supplied in a reverse direction at a small distance to tension the longitudinal portion of the zipper tape 1 under a predetermined tension. Method for producing a zipper chain, characterized in that it further comprises the step of. The inner longitudinal edge of each zipper tape (1) according to claim 1 or 3, for inserting the separate bottom stop members (25, 26) into the box of the separate bottom stop assembly after the injection molding step (e). And forming a pair of U-shaped cutouts (33) extending laterally from said positioning holes (16a, 16b). In the apparatus for manufacturing a zipper chain having a pair of separate bottom stop members (25, 26) formed on a pair of continuous zipper tapes (1), (a) a pair of continuous zipper tapes (1) intermittently along a supply path (B) a supply means for supplying, and (b) disposed in a supply path, for measuring the moving length of the supplied zipper tape 1 to determine a pair of separate bottom stop members of each zipper tape 1; Attaching means arranged downstream of the measuring means 3-1 for attaching a pair of reinforcing films to the measuring means 3-1 and (c) the separate lower end member forming part of the zipper tape 1, respectively. (4) and (d) the downstream side of the measuring means 3-1, and the attachment to form a pair of positioning holes 16a, 16b at a pair of predetermined positions on the reinforcement film 11; A puncturing means 5 operatively locked to the means 4 and (e) disposed downstream of the puncturing means 5, Has a pair of positioning pins 17 which can be accommodated in the positioning holes 16a, 16b of the zipper tape 1 for positioning the longitudinal portion of each zipper tape 1 in the unit 7, A molding unit 7 operable to form a pair of separate bottom stop members 25 and 26 on the longitudinal portion of the zipper tape 1, and (f) in accordance with the information received from the measuring means 3-1. Apparatus for manufacturing a zipper chain, characterized in that it comprises a control means (8) for controlling the operation of the supply means (2), the attachment means (4), the drilling means (5) and the molding unit (7). 6. A forming unit as claimed in claim 5, comprising a forming unit operable to form two rows of coupling elements 24 in the longitudinal portion of the zipper tape 1 simultaneously with the pair of separate bottom stop members 25, 26. Device for manufacturing a zipper chain. The drilling means (5) according to claim 5, for measuring the moving length of the zipper tape (1) for feeding the zipper tape (1) into the molding unit (7) with a length slightly longer than a predetermined molding length. A second measuring means (3-1) disposed between the molding unit (7) and the reverse supply means for feeding the zipper tape (1) in the reverse direction and tensioning the longitudinal portion of the zipper tape under a predetermined tension ( 9, 10) apparatus for manufacturing a zipper chain comprising a). 8. The second measuring means (8) according to claim 7, wherein the back feeding means (9, 10) are adapted to clamp the zipper tape (1) to prevent the longitudinal portion of the zipper tape (1) from passing in the reverse direction. Tape clamping means 9 arranged upstream of 3-2), and said tape clamping means 9 and said second measuring means (3-) for pulling said longitudinal portion of zipper tape 1 in the reverse direction. 2) A device for manufacturing a zipper chain comprising a tape pull back means (10) disposed between. The method according to claim 8, wherein the tape pullback means (10) comprises a zipper tape (1) for bending the zipper tape (1) in a V shape between the tape clamping means (9) and the second measuring means (3-2). The zipper chain manufacturing apparatus characterized in that it comprises a pullback bar (10-1) reciprocating in the direction perpendicular to the plane of the). 8. The molding unit (7) according to claim 7, wherein the molding unit (7) is composed of a pair of mold members (7-1, 7-2) which move relative to each other, and the positioning pin (17) is loaded by a spring and the pair A pair of pin receiving holes which vertically protrude from the mold surface of the movable mold member 7-1 in the mold member of the mold member, and the other mold member 7-2 of the pair of mold members accommodates the positioning pin 17; Apparatus for manufacturing a zipper chain, comprising (18). 11. A pair according to claim 10, arranged in each of the pin receiving holes (18) and actuated by the positioning pins (17) when the positioning pins (17) are received in the corresponding pin receiving holes (18). It further comprises a proximity switch 19, characterized in that the proximity switch 19 is connected to the control means 8 to control the operation of the reverse feed means 9, 10 via the control means 8. Device for manufacturing a zipper chain. 8. A zipper tape according to claim 5 or 7, which is arranged downstream of the forming unit 7 for inserting the separate bottom stop members 25 and 26 into the box 35 of the separate bottom stop assembly. Positioning holes 16a and 16b of the zipper tape 1 to form a pair of U-shaped cutouts 33 extending laterally from the inner longitudinal edge of 1) to the positioning holes 16a and 16b. Apparatus for manufacturing a zipper chain, characterized in that it further comprises a cutting means 36 for cutting off a portion of the zipper tape (1) using.